Electrical drawer-lock.



B. w. cL'AusoN.

ELECTRICALDRAWER LOCK.

APPLICATION FILED APR. I0. |917.

Lw. Patented May 7,1918.

2 SHEETS-SHEET l.

B. W. CLAUSON.

ELECTRICAL DRAWER LOCK.

APPLICATIQN FILED APR. lo. 1911.

L Patented May7,1918.

2 SHEETS-SHEET 2.

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naar chanson', or f' t nnncrcan n application med April llc, 1917.Serial Ito, Mimet.

ATo all 'whom it may concern? Be it known thatl ll, BRYANT W. CLAUsoN, acitizen Aof the United States, and resident of Rexford, in the county\ofThomas and State of Kansas, have invented certain new and usefulimprovements in Electrical Drawer-Locks, of which the following is aspecification.

This invention relates to furniture and has more particular reference toan improved drawer lock for desks and like articles.

The invention has for its dominantobject to provide an electricallyoperated drawer lock whereby certain or all of the drawers of the deskcan be automatically locked in their closed positions without the use oflevers, springA catches or similar devices.

llt yis also an object of the invention to provide means forautomatically moving the drawers to open positions, immediately sub1 seuent to the unlocking of the same.4

ther and further improvements and novel details in the construction andarrangement of parts will be appreciated from v through the medium thedescription to follow, which for a clear understanding of the inventionshould be considered in connection with the accompanying drawingsforming a part hereof and wherein the preferred embodiment of theinvention is shown for y.the purpose of illustration.

lin the drawings:

Figure l is a fraentary vertical longitudinal section through a deskwith my improved electrically operated lock applied thereto;

llig. 2 is a fraental end elevation thereof,"

lBig. 3 is a detail in perspective of the i electrically operatedlocking bolt;

liig.4 is a diagraatic view showing the wiring of the electricallyoperated bolts; and

llig. 5 is a detail in elevation of the im-` proved circuit closingmeans for energizing the various electrically operated bolts.

Referring now more specihcally to the several hgures of the saiddrawings and in connection with which like reference characters willdesignate corresponding parts, there is shown a usual oce desk indicated'ts entirety y the numeral l and having at d therein in proximity of theopposite sldes of the same, a plurality of longitwally dissed supportingbars desigof the same are then extended nated 2, the oppositeextremities of which are engaged -with similar transversely disposedbars 3, whereby the various drawers 4 of the desk will be slidablysupported therein. lt is to be noted, in this connection that thedrawers 4 are of a length slightly less than the length of the desk 1and as a consequence," a Achamber for' receiving the electricallyoperated lock, which will be subsequently described, is provided.

Upon the rear transversely disposed sup` porting bars 3, magnetsy 5 aresecured of suitable straps or like connections, while to the oppositesides of the drawer compartments of the said desk, apertured guide bars6 are secured. Bolts 7 are slidably received through the openings formedin the guide bars 6 and carry upon their upper extremities armatures 8,adapted to be attracted, at times, by the poles of their respectivemagnets 5. To the rear ends of each of the drawers 47 keepers 9 areadlxed, as at l0 and are so positioned as vto receive the lower`extremities of the slidable bolt 7 therein. Contractile coiled springs11 are secured to the lower faces of the rear end of the drawers 4 andthe forward transversely supporting bars 3 of the desk and obviously,serve as means for automatically moving the said drawers to openposition immediately subsequent to the disengaging of the locking meanstherefrom.

lln Fig. 4, there is shown a diagrammatic view of the method f wiringthe various magnets 5 whereby the same may be independently energized toactuate their respective armatures 8 and the slidable bolts 7 carriedthereby. Main wires a are engaged with the opposite poles of a suitablesource of electrical energy b, one end of one of the wires being engagedwith the contact point of a spring switch arm c while the other isengaged with a plurality or series of branch wires designated ai'. lnthese branch wires 0l', the magnets 5 are interposed and the remainingor free extremities into engagepoints c of to be noted, is formed ofspring ment with the various contact the circuit closing switch. llt isthat the switch arm metal and, as shown in Fig. 5 is normally maintainedin spaced relation from the various contact points c. Thus, when itisdesired to close any one of the magnetic energizin circuits, the armmust be depressed in order that it ithe desired point. By this means,movement of the switch arm to the desired position previous to theclosing of the selected magnetl energizing circuit 1s permitted. v

In operation, when it is desired to release certain of the slidabledrawers'f, the proper magnets 5 are energized, thereby drawlng theslidable locking bolts 7 together with the armature plates 8 intoengagement therewith. Obviously, upon disengagement of the bolt 7 fromits respective keeper 9, the

articular drawer as locked thereby will be mstantly moved to openposition due to the engagement of the contractile spring 11 therewith.The drawer may be readily closed, since, the locking bolt 7, due to itsengagement with the electro-magnets 5 is out of the path of travel ofthe keeper 9.

a plurality of magnets supported adjacent mesme.

- adjacent ends of said drawers for receiving the bolts therein, attimes, means for independently energizing `the magnets, and meansengaged with the forward portions of said article and the variousdrawers for imparting movement thereto subsequent to the releasing ofthe bolts.

2. The combination with an article of lfurniture and the slidabledrawers thereof,

of a plurality of electro-magnets supported adjacent the rear portion ofthe article, apertured guide bars arranged in proximity of saidelectro-magnets, slidable bolts received by the guide bars and havingarmature plates arranged on their upper ends, keepers carried on theadjacent ends of said drawersfor receiving the bolts therein, at times,means for independently energizing the 'electromagnets, and a pluralityof contractile springs-engaged with the forward portions of said articleand the various drawers for moving the same to open position subsequentto the releasin of the bolts.

In testimony whereof, I a x my signa ture hereto.l

` BRYANT W. CLAUSON.

